#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const int INF = 1073741823;
const ll INFl = 1LL << 60;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
const ll MOD = 1000000007;
using vec = vector<ll>;
using mat = vector<vec>;
using matx = vector<mat>;

ll f(string x) {
  int n = x.size();
  matx dp(n+1, mat(2, vec(10, 0)));
  dp[0][0][0] = 1;
  rep(i, n)rep(j, 2)rep(k, 10) {
    int lim = j ? 9:x[i]-'0';
    rep(d, lim + 1) {
      if(d < k) continue;
      dp[i+1][j||d<x[i]-'0'][d] += dp[i][j][k];
      dp[i+1][j||d<x[i]-'0'][d] %= MOD;
    }
  }
  ll res = 0;
  rep(k, 10) {
    res += dp[n][0][k] + dp[n][1][k];
    res %= MOD;
  }
  return res;
}

int main() {
  int N; cin >> N;
  string x = "1";
  rep(i, N) x+='0';
  cout << f(x) << endl;
}